C#泛型的嵌套定義

    public class yjProcessNode<T> where T : yjProcessNode<T>    {        //SortedList不允許有重複的Key,因為SortNumber可能重複，因此不能用        internal protected List<T> FChildren = new List<T>();        internal protected bool FIsRoot = true;        internal protected T FParent = null;        internal protected csProcess FProcess = null;        public csProcess Process { get { return FProcess; } }        public List<T> Children { get { return FChildren; } }        public bool IsRoot { get { return FIsRoot; } }        public T Parent { get { return FParent; } }        public bool Find(T ANode)        {            if (ANode == this) return true;            else            {                foreach (T n in FChildren)                {                    if (n.Find(ANode))                        return true;                }            }            return false;        }    }    public class yjProcessNode1 : yjProcessNode<yjProcessNode1>    {        internal protected bool FIsAuthorized = true;        public bool IsAuthorized { get { return FIsAuthorized; } }    }    public class yjProcessNode2 : yjProcessNode<yjProcessNode2>    {        internal protected Dictionary<string, byte> FAuthoriy;        public yjProcessNode2()        {            FAuthoriy = new Dictionary<string, byte>();        }        public byte GetActionAuthority(string AActionID)        {            byte vValue=0;            if (!FAuthoriy.TryGetValue(AActionID, out vValue))                vValue = 0;            return vValue;        }    }

使用Convert.ChangeType來做強制轉換：

private static List<T> _BuildUserProcessAuthorityView<T>(string AUserID, string AProcessID,            out bool AIsAdministrator) where T : yjProcessNode<T>, new().......    bool vIsProcessNode2 = (typeof(T) == typeof(yjProcessNode2)) || (typeof(T).IsSubclassOf(typeof(yjProcessNode2)));    yjProcessNode2 n2 = (yjProcessNode2)Convert.ChangeType(n.Value, typeof(yjProcessNode2));